KARACHI - Rupee remained stable against US dollar and it was traded at highest price of Rs 105.50 in cash-free market on Tuesday.  According to the data provided by Forex Association of Pakistan, US dollar traded at minimum price of Rs 104.85 and maximum price of Rs 104.90 in inter bank while the dollar traded at lowest price of Rs 105.30 and highest price 105.50 in open market.